docs: def value_ranges(self, value_ranges):
          '''Set the types, min/max values for tunable parameters
  
          Args:
              value_ranges (list): each element defines a tunable variable in
                  the form "(type ('int' or 'float'), (min_val, max_val))";
                  initial, random values for each bee will between "min_val" and
                  "max_val"
          '''
  
          self._value_ranges = value_ranges
          self._logger.log('debug', 'Value ranges set to {}'.format(
              value_ranges
          ))